Knockdown box.



J. K. P. BINGAMAN.

.KNOCKDOWN BOX. APPLICATION mzn'JuLv I3, 1915.

JAMES K. P. BINGAIVIAN, F CINCINNATI, OHIO.

Knocnnown son.

Liscate. A

Application filed July 13, 1915.

To all 107mm) it may concern Be it .known that I, JAMES K. I. EINGA- vMax, a citizen of the United States, residing I berboard, paper .boardor other material,

and. are utilized for the purpose of shipping goods from one point toanother.

More especially the invention relates to a lock for the folding flaps ofa box of this description made from what is known as corrugated board,the same consisting of a pair of plain sheets of fiber board havingbetween them a corrugated sheet of liber board so that a thick and stiI"board is formed while at the same time it possesses resiliencysutiicientto enable the transporta: tion of such articles as eggs andthe like through the parcel post and yet is sufficiently stili toprevent denting orpuncturing with consequent injury of the contents.

Heretofore it has been found that the locks ordinarily employed infolding cartons could not be utilized with corrugated board for thereason that such locks required more or less bending of the board andwere not fitted to permit such bending.

The principal object of the present invention is to provide an improvedlock of this character which isfitted for use in connection with anytype ot' folding fiber board carton and especially with that type, aboveindicated, which employs corrugated board.

`Another important defect that has hitherto existed in cartons of thisdescription is that the tongues and slits employed tor locking thedifferent portions of the carton together were liable to tear at theirnecks or extremities.

A second important object of the invention is to provide, in a device ofthis description, an arrangement of tongues and slits wherein theliability to tear at the necks and extremities of the tongues and slitswill be greatly reduced.

lith the above andather objects in view,

' the invention consists in general of certain Specification of Lettersatent.

.flaps used in connection herewith.

satelites auw. it, rais.

Serial No. 39,667.

In the accompanying drawings, like characters of reference indicate likeparts in thL several views, and 'Figure l is a view of the end of a'folding carton blank provided with interlocking means for the end andside flaps constructed in accordance with one form of the presentinvention. Fig. 2 is an end view of such a carton showing the'interlocking means in locked position. Fig. 3 1s an enlarged detail ofthe interlocking means in its locked position. Fig. l is a detail viewof one of the tongue-provided Fig. 5 is a detail View oi' one of theslitted flaps cooperating with such a tongue-provided Hap as isillustrated in Fig. Ll.

In carrying out the objects of the invention, l'liave disclosed, as oneembodiment, a. box having a bottom A, sides B, ends C, and end liaps D.rllhe sides are defined from the bottom by means of fold scores orcreases l0 and the ends are similarly delined from the bottom by fold.scores or creases ll. .ln like manner the end flaps D are defined from'the ends C by fold scores or creases l2, thus enabling the boX to beproperly folded into locking position. Each of the sides B is providedadjacent each end with a substantially U-shaped slit 13, in the forniVshown in Figs. l to 5, and this U-shaped slit has at each extremityofthe U a substantially circular opening lit, 'the base ot Vthe triangle'thus cut from the side being dfined by a fold score or crease 15. Eachof the end flaps D is provided with a tongue of blunted and roundedarrowhead shape as indicated at l5, the tongue having a reduced neck i6and being provided with the fold scores or creases 17 extending from thesides of the neck to the apex i8 such tongue, and also with a fold score17 ex tending across the neck and fold score l?"extending.perpendicularly from the center ci the score 17 to the apex ofthe head.

lt is to be noted that the sides of the neck 16 are so rounded as toprevent tearing oit the tongue and that the fold scores or creases 17correspond in angularity and dimensionswith the sides of the slitl3,.the breadth ont' the neck 16. corresponding to the base or' thevtriangle formed bytheslitll' and foid score 15 in each instance. lt isalso to be noted that, in each instance, the stresses are` broughtagainst rounded parts so that possibility of tearing is eliminated.Furthermore, these side parts of the head, by reason of the arrangementof the fold scores, snugly it the tongue When the box 1s set up so thatlateral movement is prevented.

In assembling the device, 1tl is merely It is obvious that minor changesmay be made in the form of construction of the der' vice withoutdeparting from the material principles thereof. lt is not therefore de.-sired to confine the invention to the exact form herein shown anddescribed but it ,is wished to include all such as properly come withinthe scope claimed. v r

It is also obvious that the' carton may be Water-proof either inside oroutside, as by paraffin or any other suitable material.

Having thus described the invention, What is claimed is zy l. In afolding carton lock, a locking elenient having a head provided with areduced neck and having fold scores extend ing from the sides of theneck to the apex of the head, in combination with a'. member v having areceiving slot terminating in sub-v stantially circular openings"cooperating with the sides of the neck, the'slot defining a tonguefitting closely between thesaid fold scores of the head.

i 24.3111 afolding cartonlock, a locking elethe head, in combinationwith a.

agli.`

-a head provided with a 're- SilA from the sides of the neck lto theapex of the head,a fold score extending across the neck,

neck and intersecting the cross fold score,iin combination with a memberhaving a receiving slotterininating in Substantially circular openingscop'erating with the sides of the neck, said substantially circularopen-- fings cooperating with the sides of the neck of the lockingelement when locked the slot.

a tongue fitting 'closely between the defining fold scoresv of the head.

said rst and a fold score extending medially of the- Ll. ln a foldingcarton lock, a locking elef ment having an arrow-head provided with arounded peripheryand a neck and having fold scores'extending from thesides of the neck to the apex of ,the head, in combination with a.,member having a substantially U- shaped receiving'lslot terminating' insubstantially circular openings cooperating with the sides ofthe neck,said substantially circular openings cooperating with the sides ofy theneck of the. locking element when i locked;

, In testimony whereof I affix my signature.

J P. BINGAMAN.

